<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge,chrome=1">
    <title>Document</title>
    <style>
        .container {
            border: 1px solid red;
            position: relative;
            height: 400px;
        }
        .leftContent {
            width: 300px;
            height: 400px;
            border: 1px solid blue;
            position: absolute;


        }
        .rightContent {
            width: 500px;
            height: 400px;
            border: 1px solid green;
            position: absolute;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="leftContent">leftContent</div>
        <div class="rightContent">rightContent</div>
        <div class="picList">ffffffffffffffffffpicList</div>
    </div>
    <div class="footer">Footerfdsfsdfsdffffffffffffffffffffffffff</div>
</body>
</html>